Alert archive / North Dakota / Severe Thunderstorm Watches in 2018

Severe Thunderstorm Watch 256

July 2, 201819 counties in North Dakota; 17 counties in South Dakota

The Storm Prediction Center issued this severe thunderstorm watch at Jul 2, 2018, 6:36 PM MDT for 19 counties in North Dakota; 17 counties in South Dakota. It was in force for 9 hr.

The area

The outline as issued.

The facts

Issued
Jul 2, 2018, 6:36 PM MDT (00:36 UTC)
Expired
Jul 3, 2018, 3:25 AM MDT
In force
9 hr
Issued by
the Storm Prediction Center
Largest hail expected
2 in
Strongest gust expected
60 kt
All 36 counties

Adams County, ND, Bowman County, ND, Burleigh County, ND, Dickey County, ND, Emmons County, ND, Grant County, ND, Hettinger County, ND, Kidder County, ND, LaMoure County, ND, Logan County, ND, McIntosh County, ND, Morton County, ND, Ransom County, ND, Richland County, ND, Sargent County, ND, Sioux County, ND, Slope County, ND, Stark County, ND, Stutsman County, ND, Brown County, SD, Campbell County, SD, Clark County, SD, Codington County, SD, Corson County, SD, Day County, SD, Edmunds County, SD, Faulk County, SD, Grant County, SD, Hand County, SD, Harding County, SD, Marshall County, SD, McPherson County, SD, Perkins County, SD, Roberts County, SD, Spink County, SD, Walworth County, SD

The radar

The Bismarck radar (KBIS), 77 km from the middle of the area, began a volume at 00:38 UTC, the scan nearest the moment this went out.

Open the radar archive at this moment

The archived warnings, watches and discussions in force at that minute are drawn over the scan, this one among them.

What SPC expected

The probabilities SPC published with the watch, for the watch area over its life.

Two or more tornadoes
20%
One or more EF2 to EF5 tornadoes
5%
Ten or more severe wind reports
40%
One or more gusts of 65 knots or more
20%
Ten or more severe hail reports
40%
One or more hailstones of 2 inches or more
30%
Six or more combined severe hail and wind reports
70%

Warnings issued inside it

34 tornado, severe thunderstorm and flash flood warnings for its counties while it was in force.

IssuedProductOfficeCountiesLasted
Jul 2, 6:55 PM MDTSevere Thunderstorm WarningABRHand, Spink50 min
Jul 2, 7:06 PM MDTSevere Thunderstorm WarningBISGrant, Hettinger54 min
Jul 2, 7:06 PM MDTTornado WarningABRSpink24 min
Jul 2, 7:12 PM MDTSevere Thunderstorm WarningABRHand33 min
Jul 2, 7:42 PM MDTSevere Thunderstorm WarningABRBrown48 min
Jul 2, 7:48 PM MDTSevere Thunderstorm WarningABRSpink42 min
Jul 2, 7:51 PM MDTSevere Thunderstorm WarningFGFRansom, Richland, Sargent54 min
Jul 2, 7:53 PM MDTSevere Thunderstorm WarningBISGrant67 min
Jul 2, 8:00 PM MDTSevere Thunderstorm WarningABRHand, Hyde25 min
Jul 2, 8:06 PM MDTSevere Thunderstorm WarningABRSpink39 min
Jul 2, 8:18 PM MDTSevere Thunderstorm WarningABRHand, Spink42 min
Jul 2, 8:27 PM MDTSevere Thunderstorm WarningFGFCass, Ransom, Richland, Sargent48 min
Jul 2, 8:41 PM MDTSevere Thunderstorm WarningABRHand49 min
Jul 2, 9:13 PM MDTSevere Thunderstorm WarningABRHand, Spink15 min
Jul 2, 9:18 PM MDTFlash Flood WarningABRHand, Spink8 hr
Jul 2, 9:43 PM MDTSevere Thunderstorm WarningABRClark, Hamlin33 min
Jul 2, 9:45 PM MDTSevere Thunderstorm WarningABRHand, Spink45 min
Jul 2, 10:30 PM MDTSevere Thunderstorm WarningABRHand45 min
Jul 2, 10:35 PM MDTFlash Flood WarningABRHand, Spink8 hr
Jul 2, 11:02 PM MDTSevere Thunderstorm WarningABRHand43 min
Jul 2, 11:33 PM MDTSevere Thunderstorm WarningABRFaulk, Hand18 min
Jul 2, 11:44 PM MDTSevere Thunderstorm WarningABRHand46 min
Jul 3, 12:12 AM MDTSevere Thunderstorm WarningBISGolden Valley, Slope63 min
Jul 3, 12:37 AM MDTSevere Thunderstorm WarningBISBowman, Slope53 min
Jul 3, 12:51 AM MDTSevere Thunderstorm WarningABRHand26 min
Jul 3, 12:56 AM MDTFlash Flood WarningABRFaulk, Hand, Hyde6 hr
Jul 3, 1:02 AM MDTSevere Thunderstorm WarningUNRHarding58 min
Jul 3, 1:18 AM MDTSevere Thunderstorm WarningBISAdams, Billings, Bowman, Hettinger, Slope, Stark57 min
Jul 3, 1:43 AM MDTSevere Thunderstorm WarningABREdmunds, Faulk, Potter37 min
Jul 3, 1:46 AM MDTSevere Thunderstorm WarningUNRHarding, Perkins59 min
Jul 3, 2:15 AM MDTSevere Thunderstorm WarningBISAdams, Grant, Hettinger, Morton, Sioux, Stark60 min
Jul 3, 2:51 AM MDTSevere Thunderstorm WarningBISEmmons, McIntosh54 min
Jul 3, 2:56 AM MDTSevere Thunderstorm WarningUNRPerkins21 min
Jul 3, 3:12 AM MDTSevere Thunderstorm WarningBISAdams, Burleigh, Grant, Morton, Sioux63 min

Discussions around it

SPC mesoscale discussions over the same counties from four hours before the watch to its end.

The nearest sounding before it

Bismarck Municip, ND (KBIS), launched 00:00Z, 0.6 hours before the alert went out and 78 km from the middle of its area. This is the routine balloon launch nearest before it, the air the forecaster had in hand, not a measurement taken for the alert.

Skew-T log-pSkew-T log-p diagram, Bismarck Municip, ND at 00:00Z on 2018-07-03Temperature and dew point through the depth of the atmosphere, with the mixed-layer parcel. CAPE 86 joules per kilogram.LCLLFCEL10008507005003002001001 km2 km3 km6 km9 km12 km15 km-30°-20°-10°0°10°20°30°40°
Temperature in red, dew point in green, the mixed-layer parcel dashed.
HodographHodograph, Bismarck Municip, ND at 00:00Z on 2018-07-03The wind through the lowest 10 kilometers. Zero to 1 km storm-relative helicity 3 square meters per square second.19395878Sfc1 km3 km6 km9 kmRMLM
The wind turning with height, colored by layer: ground to 1 km, 1 to 3 km, 3 to 6 km, 6 to 10 km.
Mixed-layer CAPE
86 J/kg
Mixed-layer CIN
-47 J/kg
Mixed-layer LCL
2084 m above ground
0-6 km bulk shear
50 kt
0-1 km storm-relative helicity
3 m²/s²
0-3 km storm-relative helicity
102 m²/s²
Significant tornado parameter
0.0
Supercell composite
0.3

Open this sounding in Storm Lab

SPC that day

Everything else SPC issued on the same UTC day.

IssuedProductOfficeCountiesLasted
Jul 2, 8:50 PM MDTMesoscale DiscussionSPCAdams, Bowman, Dickey, Emmons, Grant, Hettinger and 9 more115 min
Jul 2, 10:32 PM MDTMesoscale DiscussionSPCCass, Richland88 min
Jul 2, 11:01 PM MDTMesoscale DiscussionSPCAdams, Bowman, Golden Valley, Grant, Hettinger, Slope and 1 more89 min
Jul 3, 12:59 AM MDTSevere Thunderstorm WatchSPCAdams, Barnes, Billings, Bowman, Burleigh, Cass and 26 more7 hr
Jul 3, 3:15 AM MDTMesoscale DiscussionSPCAdams, Barnes, Billings, Bowman, Burleigh, Cass and 26 more90 min
Jul 3, 6:01 AM MDTMesoscale DiscussionSPCBarnes, Cass, Dickey, Kidder, LaMoure, Logan and 6 more119 min
Jul 3, 5:16 PM MDTMesoscale DiscussionSPCDickey, LaMoure, McIntosh, Ransom, Richland, Sargent2 hr
Jul 3, 2:25 PM MDTMesoscale DiscussionSPCLawrence2 hr
Jul 3, 4:42 PM MDTSevere Thunderstorm WatchSPCBennett, Butte, Custer, Fall River, Haakon, Harding and 7 more7 hr
Jul 3, 5:42 PM MDTSevere Thunderstorm WatchSPCBrown, Clark, Day, Edmunds, Faulk, Hand and 8 more4 hr

Nearby

Severe Thunderstorm Watches in North Dakota, 2018Severe Thunderstorm Watches in South Dakota, 2018Every severe thunderstorm watch in 2018

Sources

The product and its follow-ups from the Iowa Environmental Mesonet's archive of National Weather Service and Storm Prediction Center text; the sounding from the Mesonet's radiosonde archive; radar from the NEXRAD Level II archive.